Arianna Huffington (born Arianna Stassinopoulos on July 15, 1950) is a Greek-American author and syndicated columnist. She is best known as co-founder of the news website The Huffington Post. A popular conservative commentator in the mid-1990s, she moved sharply to the left in the late 1990s. She is the ex-wife of former Republican congressman Michael Huffington.

She is also best known as the voice of Arianna in Seth MacFarlane's Family Guy spin-off The Cleveland Show.

She appears in live-action in "Brian Writes a Bestseller" with Bill Maher and Dana Gould in an episode of Real Time with Bill Maher.